Thomas shelton



(No Model.)

' T. SHELTON.

APPARATUS POR SEALING PIPE ,r0INTs- No. 413,738. Patented Oct. 29, 1889.

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` To all whom it may concern.-

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UNITED STATES PATENT OFFICE.

, THOMAS ,SHELTON, OFMOKEESPORT, PENNSYLVANIA, ASSIGNOR TO TI-IE NATIONAL TUBE WORKS COMPANY, OF SAME PLACE.

APPARATUS FOR SEALING PIPE-JOINTS.

SPECIFICATION forming 'pea of Letters Patent No. 4112738, dated october 2e, 1889.

Original application filed J' une 16, 1887, Serial No. 241,489. Di

vided and this application filed .April 20, 1889. Serial No. 307,985.

(No model.)V

Be it known that I, THOMAS SHELTON, a resident of McKeesport, in the county of Allegheny and State of Pennsylvania, ,have invented a new and useful Improvement in Apparatus for Sealing Pipe-Joints; and I do hereby declare the following to be a full, clear, and exact description thereof.

, My invention relates to an apparatus for the sealing of pipe-joints, its object being to prevent the calking material from Vrunning through the crevice or crevices of the -joint into the interior of the pipe without the use of`any permanent packing material. With almost all pipe-joints, and especially in castiron pipe, there is between the spigot end and the bowl end a crevice through which the calking material will run into the interior of the pipe when poured into the calking-recess. In connecting the sections of cast-iron pipes there is always inserted in the rear end of the calkingrecess formed between the spigot end and the overlappingV bowl some packingv material to pack the base of thue calking-recess, and thus prevent the calking material, when poured into the recess,""fr`om running through the crevice between the ends of the pipe-sections into the interior of the pipes; but this is objectionable, in that it requires a longer bowl on the pipe V,to give sufficient depth of recess for both the packing and the calking material, and when the Vmaterial is to be calked to render the joint tight it has to be driven against a yielding backing, andV for this reason cannot be spread or calked so perfectly. Where vwrought iron or steel pipes are connected by lead or like joints, when no packing is used, there is' also more. or less difficultywith the calking material running through the crevice between the end of one pipe andthe abutting pipe or the pipe and the coupling, and when any deviation takes place in the line, so that the pipe does not rest true within the coupling, the leakage becomes quite troublesome. g

To enable others skilled in theJ art to make and use my invention, I will describe the same more fully, referring to the accompanying drawings, in which@ Figure 1 is a vertical central section of a pipe, showing my apparatus ready to be eX- panded against the crevice of the joint; and Fig. 2 is a section of Fig. 1 on the line a: oc, showing the parts expanded.

Like letters refer to like parts in each of the figures of the drawings.

In the ordinary form of cast-iron-pipe joint--such as shown in the drawings-when the spigotend at is inserted in the bowl end b there is always a crevice c, leading from the calking-recess d into the interior of the pipe, 4through which the calking material may run into the interior when it is poured into the calking-recess. With the ordinary sizes of cast and wrought iron pipe, to pre- -vent this running of the calking material I find the form of apparatus shown in an application filed by me June 16, 1887, Serial'No. 241,489, suit-able for the purpose, the present application being a divisional application of that application. Where pipes of large diameter are to be j oined--esuch as the joint of a` twenty-inch to thirty-siX-inch pipe-the forni` of apparatus shown in the present application'is better adapted for the purpose. In this construction the two disks @and f are rigidly attached to each other at a suitable distance apart, and swiveled or journaled in the disk e is the inner rod g, which projects through an opening in the disk f, and also through the hollow rod h, and carries keyed to its outer end the hand-Wheel The hollow rod h has a similar handwheelyl secured to it, and it is rigidly attached to the disk f, as in the other form of the device heretofore described. The shaft or rod h carries between the disks e and f the tappet-cam k,

" which acts on the ends ot' rods or bars Z,slid

ing in suitable guides m, attached to the disks, these rods having on their outer ends or attached thereto the segments Z, on which rests the split ring fn, and outside of this ring is the expanding asbestus ring o. To insure the return of the segment-arms Z to their normal position, a coiled spring m is placed laround each rod, one end of the spring bearing against the upper guide m and the other against a collar p, attached to the rods Z between the guides m. In this case, as the pipes are suciently large to allow a boy or man to enter Within them, the rods g and 71 need not be very long, as there is no necessity for them to project beyond the end of the pipe to operate the apparatus. On the outer surface of each disk, near their peripheries, are the lugs f', in which are journaled small guide-rollers f2, which project slightly beyond the periphery of the disks, and serve to support and guide the apparatus While it is being inserted in the pipe, and overcome friction between the apparatus and interior of the pipe.

Vhen the joint is to be sealed, the boy or man enters the pipe, pushing the device ahead of him, and when the device is in proper position he holds by one hand on the hand-Wheel j the device in position, while with the other 11e turns the hand-wheel and rod g,whicl1 causes the cam k on t-he shaft to act on each one of the rods l, forcing them outward and expanding the ring 0 against the contiguous surfaces of the crevice of the joint. The joint is now ready for the calkin g material to be poured in the recess: as heretofore described.

XVhen the operation has been completed by turning a little farther the hand-Wheel ,'the cam k allows the rods to be forced backward by their springs until the ringo is contracted sufficiently to be out of contact with the inner surface of the pipe, and thus the device can be readily Withdrawn. This means for calking pipe-joints has the advantage that all liability of the calking material running into the interior pipe is avoided without the use of any permanent packing material, and hence a much tighter joint is obtained, while at the same time the crevice of the joint is filled and a smooth surface formed on the interior of the pipe.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In an apparatus for closing the crevice of `pipe-joints, the combination of the ring o, of eXpansible material, the disks e and f, the cam 7c, the rods Z, the segments l', the split ling between the segments Z and the eXpan sible ring, and means for rotating said cam k, substantially as and for the purposes set forth. j

2. An apparatus for closing the crevice of pipe-joints, having a head or body carrying a ring of expansible material, mechanism for expanding the expansible ring against the crevice of the joint, and rollers j"2 on said body to support and guide the movement of said body, substantially as and for the purposes set forth.

In testimony whereof I, the said THOMAS SHELTON, have hereunto set my hand.

THOMAS SHELTON. Witnesses:

J. N. COOKE, RoBT. D. TOTTEN. 

